My DR650 stalled and would not start. It acted as it ran out of fuel but had a full tank. In the prime position, I pulled off the fuel line and fuel dripped out. I removed the fuel cap and gas shot out of the line. It was a plugged vent line for the fuel tank. Investigation showed the charcoal canister under the left number plate in the tail section was plugged up. I removed the lines going to the canister and it had gunk in it. I blew out the charcoal with an airline and reconnected the hoses. The DR was suffering from a fuel starvation problem from the plugged canister. It runs great now, so another thing to check.